. he is army ranger sergeant first class leroy petrie, six tours in afghanistan, two in iraq, a married father of four, awarded the nation's highest military honor by saving the lives of fellow troopers by picking up a live grenade and throwing its which cost him his hand and much of his forearm. this photo received wide circulation around the country today, it's the president, shaking his new prosthetic hand yesterday at the white house. we wanted to show you how matter of fact he is about the new hand, which he loves to play with and talk about and demonstrate. that's a handsome hand. >> it's wonderful. when i lost it, i thought i was going to have a hook, which i was content with. i mean i was happy the way i lost my hand, but nevertheless, to lose a hand. >> shake my hand with that. >> oh, yes. >> tell me how it feels for you. >> for me it feels like a normal handshake. it uses the same muscles that i would to open and close. it's no change from what i did before. it took me a couple of hours to learn how to use it. >> if you haven't caught on by now, this is an exceptional guy. he'